What was found in Vista's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 683.5 µg/L 17% of the EPA limit 4000 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 1/1 | SYR4 |
| TTHM | 57.464999999999975 µg/L 72% of the EPA limit 80 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Lithium | 52 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2023 | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 22.705 µg/L 38% of the EPA limit 60 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 19.6 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 18.904999999999998 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Chloroform | 18.739999999999984 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 11.004999999999999 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Bromoform | 8.2 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 6.4 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 5.9 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.17 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Arsenic | 3.17 µg/L 32% of the EPA limit 10 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.4849999999999999 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2024 | 1/1 | LCR |
Water suppliers serving Vista
| Supplier | Population served |
|---|---|
| VISTA IRRIGATION DISTRICT | 132,430 |
Frequently asked questions about Vista tap water
Is Vista tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Vista. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Vista?
1 public water supplier report drinking-water monitoring for Vista, California to the EPA. Each is listed above with its population served.
What contaminants are in Vista's water?
The contaminants EPA monitoring detected in Vista include Fluoride, TTHM, Lithium, Total Haloacetic Acids (HAA5), Bromodichloromethane. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.